<!doctype html>
<title>Video width and height attributes are not used to infer aspect-ratio</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/media.js"></script>
<script src="resources/aspect-ratio.js"></script>
<style>
  video {
    width: 100%;
    max-width: 100px;
    height: auto;
  }
</style>
<body>
<video width="250" height="100" id="contained" style="contain: size;"></video>
<script>
let t = async_test("Video width and height attributes are not used to infer aspect-ratio");
function assert_ratio(img, expected) {
  let epsilon = 0.001;
  assert_approx_equals(parseInt(getComputedStyle(img).width, 10) / parseInt(getComputedStyle(img).height, 10), expected, epsilon);
}

function test_computed_style(width, height, expected) {
  test_computed_style_aspect_ratio("video", {width: width, height: height}, expected);
}

t.step(function() {
  var video = document.getElementById("contained");
  video.src = getVideoURI('/media/2x2-green');
  assert_ratio(video, 2.5);
}, "contain:size aspect ratio");

// Create and append a new video and immediately check the ratio.
// This is not racy because the spec requires the user agent to queue a task:
// https://html.spec.whatwg.org/multipage/media.html#concept-media-load-algorithm
t.step(function() {
  video = document.createElement("video");
  video.setAttribute("width", "250");
  video.setAttribute("height", "100");
  video.src = getVideoURI('/media/2x2-green');
  document.body.appendChild(video);
  // Videos default to a size of 300x150px and calculate their aspect ratio
  // based on that before the video is loaded. So this should be 2, ignoring
  // the 2.5 that it would be based on the attributes.
  assert_ratio(video, 2);

  video.onloadeddata = t.step_func_done(function() {
    // When loaded this video is square.
    assert_ratio(video, 1);
  });
}, "aspect ratio for regular video");

test(function() {
  test_computed_style("10", "20", "auto 10 / 20");
  test_computed_style("0", "1", "auto 0 / 1");
  test_computed_style("1", "0", "auto 1 / 0");
  test_computed_style("0", "0", "auto 0 / 0");
  test_computed_style("0.5", "1.5", "auto 0.5 / 1.5");
}, "Computed style");

test(function() {
  test_computed_style(null, null, "auto");
  test_computed_style("10", null, "auto");
  test_computed_style(null, "20", "auto");
  test_computed_style("xx", "20", "auto");
  test_computed_style("10%", "20", "auto");
}, "Computed style for invalid ratios");

</script>
